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2148 Epeios (1976 UW)
Classification: Jupiter Trojan          SPK-ID: 2002148
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05800867924624638 4.6927e-08  
a 5.216027874506243 7.801e-08 au
q 4.91345298659453 2.8981e-07 au
i 9.148607639762652 5.6647e-06 deg
node 176.5561162424237 2.2375e-05 deg
peri 231.8083266243859 4.8079e-05 deg
M 326.1937918423384 4.252e-05 deg
tp 2459609.103650900995
(2022-Jan-29.60365090)
0.00051386 TDB
period 4351.192350184391
11.91
9.7613e-05
2.672e-07
d
yr
n .08273594247901823 1.8561e-09 deg/d
Q 5.518602762417956 8.2535e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2035  
   data-arc span      16151 days (44.22 yr)  
   first obs. used      1976-10-24  
   last obs. used      2021-01-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49416  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:00:42  

Additional Information
 Earth MOID = 3.93087 au 
 Jupiter MOID = .032285 au 
 T_jup = 2.971 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.84   n/a E2021B10  
diameter diameter 37.980 km 0.315 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
geometric albedo albedo 0.064   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

2148 Epeios (1976 UW)          Discovered 1976-Oct-24 by West, R. M. at La Silla
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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